Improvement in machines for threading and cutting off tubes



3Sheets--Sheet1. Lfw. STCKWELL.

Machines for Threading and Cut-ting Uff Tubes. N0.|5],5l7", f Patentedlune 2,1874.

3 Sheets--Sheert 2. L. W. S-TCKWELL.

Machines for Threading and Cutting if Tubes. N0l5],5i7, Patentediune2,i874a f7, 5%' QW Y y M v b1 @..WMMX

3 Sheets--Sheet 3.

L. W. STUCKWELL.

Mahines for Threading and Cutting Off Tubas. N0.5,5`17, PatentedJune2,l874.A

UNITED STATES PATENT CDEEIeE LEVI W. STOOKWELL, OF RAVENNA, OHIO.

IMPROVEMENT IN MACHINES FOR THREADING AND CUTTING OFF TUBES.

Specification forming part of Letters Patent No. 151,517, dated June 2,1874; application tiled September 15, 1873.

To all whom it may concern Be it known that I, LEVI W. STocKwELL, of Ravenna, in the county of Portage and State of Ohio, have invented an Improved Gasl?ipe-Fitting Machine, of which the following is a specitication:

The principal feature of novelty is the manner of cutting off, reamin g, and threading gaspipes Without stopping the machine.

Figure l is a top view of the machine. Figs. 2, 3, 4, and 5 are plans of parts used in cutting off gas-pipe. Figs. 6 and 7 are plans. Figs. 9, 10, and ll illustrate the combination of the dies, die-cases, strut-levers, and seats. Fig. l2 is a sectional elevation of the machine. Fig. 13 is an end view of the gas-pipe holder.

a is the frame of the machine. bis the driving-pulley on the hollow shaft c. On the front end of the hollow shaft is the cutter-head, con taining the dies (l dv d, which are held by pins in their cases e e e. Around the cutter-head is the sliding collar f, which revolves with the eutterhead, and is made to slide on it to open and close the dies. The sliding collar is surrounded by the ring g, which moves with the collar to open and close the dies, and has as many cams as there are dies. The die-cases e c e are connected with the ring g by the strutlevers t' fi fi and the lever-seats s s s. Flanges on the lever-seats enter the grooves h h 71., Fig. 8, in the ring, so that when the ring is turned on the collar, the lever-seats, strutlevers, diecascs, and dies are moved toward or from the axis of the cutter-head by the cams in the ring, and thus the dies are adjusted to dii'erent-sized gas-pipes. The outer ends of the strut-levers turn in the seats, and the inner ends turn in the die-eases. The forms of the levers, seats, die-cases, and dies, and the manner in which they are combined, are shown in Figs. 9, 10, and 11. There is a veruier scale on the circumference of the ring g,'and a corresponding` scale adjoining it on the sliding collar, which are marked with letters or figures to indicate the adjustment of the dies. The scales are shown, but not marked with letters or figures, in Fig. l. Grooves for the die-cases and seats are made in the cutter-head and sliding` collar. The face-plate I; is screwed fast to the front end of the sliding collar f to hold the ring g and seats, so that they may be moved by the collarf in opening and closing the dies. The collar f is made to slide on the cutterhead by means of the lever I, which is pivoted on opposite sides of the collar, at the top and bottom, to the ring m, which rests in a groove around the collar, and in which the collar revolves. rllhe lever Z has its fulcrum in the link u, attached to the frame of the machine. The sliding rod o passes under the handle of lever l, through projections of the frame. The arm p is attached to the frame and passes through a slot in lever l, and supports the handle ofthe lever. A spring fastened to the arm p passes through the slot in lever Z, and presses against the end of the small lever 1, which is pivoted in the slot. The lever 11 has a notch near its end in the slot, for the end of the spring to catch against, and hold lever l when the lever Z 1s moved forward t0 close the dies. The combination of levers l and r, and the arm p, and the spring are shown in Fig. 6. When the handle of lever r is pressed toward the handle of lever l, the end of lever o" presses the spring out of the notch, and then the spiral spring o draws back lever l', and opens the dies. One end of the spiral spring o is attached to the arm p, and the other end to the lever Z. A pin through the arm p, behind the lever l, prevents the lever from being carried back by the spiral spring farther than necessary to open the dies but when the dies are to be removed and changed for others, this pin is removed, so as to permit the spiral spring to carry back the leverl and sliding collar, until the dies are drawn out, so that the pins through the dieeases are outside of the cutter-head. These diecase pins are then taken out and the dies removed. When the machine is in operation, the pins through the die-cases are kept in place by the sides of the grooves through the eutter-head;.but the dies are very easily removed by simply pushing the pins out, when the die-cases are opened sufficiently to bring the pins outside of the cutter-head. TVhen the dies are closed, the strut-levers are perpendicular to the axis of the cutter-head. t is a gas-pipe reamer, screwed fast to the front end of therod w, Fig. 12, to ream the ends of w slides, and is rised to hold the reainer in the center of the cutter-head. To keep the collar .r in place there is a pin just back of it,

through. the rod rc. The reamer is made to revolve with the critter-head by the key or feather al, which is in a groove in the rod w, and a groove in a collar held by a set-screw in the end of the hollow shaft c. A section of the end of the hollow shaft, collar, and key al is shown in Fig. 7. rlhe rods w and 0 slide in the lever b1. The collar a2 and rod fr0, Fig. l2, and the collars a3 and af* on rod 0, Fig. l, are adjusted bytheir set-screws, so that when the thread on a gas-pipe is cut as far as required, the end of the gas-pipe, pressing back the reamer, causes the collar a2 to press back the lever b1, which presses against collar a, and draws back the rod 0 rintil its front end, which is turned up, presses back the handle of lever r, and the lever l is thrown back by the spiral spring and the dies are opened.

Before it is threaded, the gas-pipe is reamed as follows: The dies are opened and the pipeliolder moved by hand, causing the. pipe to press back the reamer until the collar a4 presses against the projection through which the rod o passes, thereby arresting the backward movement of the reamer, so that the gas-pipe may be pressed against it and the end of.' the pipe roamed. rlhe cap b2 surrounds the cutter-head, and projects over a portion ofthe sliding collar, to cover the dies and strutlevers. It is held in its position (but so as to be easily removed and replaced) by slight pins or projections on the circumference of the critter-head, which enter a groove in the cap. The vessel b4 catches and holds the cuttings, and has holes in it to let the oil escape into the reservoir beneath. The pipe-adjuster c1, Fig. 13, supports pipes of different sizes in srich a position that the center of the pipe is always exactly between the centers of the visejaws while the jaws are being closed to hold it. I* sides or edges rest on two pins, one in each side of the vise, and are at an angle of forty-live degrees to the top, which is horizontal, thus causing it, when the vise-j aws are being closed, to rise as fast as each jaw moves towaid the other. It is -griided by its lower end passing through a hole in the frame in which each side of the vise moves. The sides of the vise are moved by right-and-left-hand screws, which are trirned by a hand-wheel. The vise, with its frame, is moved to and from the critter-head in the ordinary manner, by means oi toothed wheels turning on ways in the frame of the machine, trirned by a handwheel.

The parts of the machine used in cutting oft' gas-pipe, and their arrangement and mode of operation, are as follows: rEhe toothed wheel e2 has three hollow projections on one side, through which it is irmly attached to the cutter-head by screws. lllhis wheel, Figs. 3 and 4.-, holds the critter c3, which is fastened by set-screws to the cutter-carrier c4. The toothed cam-wheel d-l turns on a shoulder of, and against the side of, wheel c2. It has a canigroove, d2, extending only part of the way around, in the side which is against wheel c2, so made that from one end of the cam-groove to the other end it gradually approaches the ccnter of wheel (Z1. A projection on the cuttercarrier c4 extends into this canigroove, so that by the turning of wheel d1 on the wheel c2 the cani moves the critter-carrier and critter to or from the gas-pipe to be cut off, which passesn through the brish d3 in the hole through the centers of the wheels. The bush d3 is held in this hole by a set-screw. The brish is cut awa-y on one side, so as to permit the cutter to approach and cut the pipe. Different-sized bushes are used to iit and support different-sized pipes while being cut off. Fig. 2 shows the mechanism for operating the cam-wheel d1. The standard which supports arbor d4 is screwed to the frame ofthe machine. The arbor is fastened in the standard by a set-screw. The wheel d5 is trirned on one end of the arbor by the wheel c2. The wheel z" clutches with the wheel d5, and is turned by it on the arbor. rlhe wheel il turns the cani-wheel d1. The wheels d5 and il each have the same number of teeth; but the cam-wheel d1 has one tooth less than wheel c2, and, consequently, the cam-wheel revolves faster than the wheel c2, and thereby carries .in the critter.

Fig. 5 is a section, showing the cam-groove, and is indicated by the dotted line in Fig. 12. The ring i2 around the arbor is in a recess formed in wheel il. A pin passes througlrthe rod 3, and also throrigh a slot in the arbor into opposite sides of the ring i2, for the purpose of sliding the wheel l on the arbor by moving the rod The rod 3 extends from the pin through a hollow in the arbor to the end of the arbor, and their passes through the knob or handle i4, which turns on the rod, but is kept from sliding on it by a shoulder and a nrit. The knob screwson the arbor. Zhen the knob is trirned on the arbor-screw the wheel il is thrown in or out of clritch with wheel d5 by means of the rod i3 and the pin and ring i2. When the knob is trirned to draw the wheel il out of clutch it is turned enorigh to draw the wheel il against the washer m1, which, by its friction against the wheel7 stops it from revolving on the arbor, and carises it to arrest the motion of. the earn-wheel d1 until the projection on the cutter-carrier has moved back to the outer end of the cam-groove, where it remains and turns the cam-wheel by pressing against the outer endof the groove, until the knob is turned in the opposite direction, and the wheel il again thrown in clriteh with wheel d5.

Some ofthe principal parts in this machine are claimed in my application i'or a boltthreading machine, and in my application for a nrit-tappiii g machine. Y

cutter-carrier c4, having :t projection, which enters the @atm-groove d?, and the Wheels c2, d1, (15,2tml il, substantially as und for the purpose herein set forth.

4. The eom'binationoi the cutter c3, `cutterourrier c4, hrt-ving the projection which enters the ozun groove d2, the Wheels a2 di d5 111, and the bush d3, substantially as and for the purpose herein set forth.

5. The Wheel d5, in combination with wheel il, arbor (Z4, ring i2, and rod 3, with their oonneoting-piu, and the knob i4, substantially as and for the purpose herein set forth.

LEVI W. STOOKVELL.

Y'Vitnessos G. F. RoBINsoN, BRADFORD HOWLAND. 

